US2722435A - Carbon holder for continuous-form stationery - Google Patents

Description

Nov. 1, 1955 L. K. FLEISCHMANN CARBON HOLDER FOR CONTINUOUS-FORM STATIONERY Filed Oct. 20, 1951 FIE- E1 FIE 4 INVENTOR. LESTER K FLEISCHMANN ATTORNEYS.

United States Patent Ofiice 2,722,435 Patented Nov. 1., 1955 CARBON HOLDER FOR CONTINUOUS-FORM STATIONERY Lester K. Fleischmann, Chicago, Ill. Application October 20, 1951, Serial No. 252,345

4 Claims. (Cl. 282--1) This invention relates to a carbon holder for use between strips of continuous form stationery, and more particularly to a permanent leader sheet adapted to hold a replaceable supply of folded carbon sheets.

The primary object of the invention is to provide an improved carbon holder which will permit a worn out supply of carbon papers to be removed and replaced with a new pack without removing the leader sheet or changing its position in the stationery. The device is particularly useful in connection with fanfold stationery wherein the superposed strips are interconnected along one marginal edge.

A further object of the invention is to provide an improved holder in which the carbon sheets in extended position may be pulled against their line of stitching rather than the edge of the pocket in the leader sheet.

A further object of the invention is to provide an improved method of holding the leader sheet to a carbon holding blade in a machine.

Still another object of the invention is to provide a simple inter-fitting connection between the leader sheet and backing sheet, so that when the latter is slid into position it will be properly positioned.

The invention is illustrated in a preferred embodiment in the accompanying drawings, in which Fig. 1 is a fragmentary plan view of a permanent leader sheet, showing how it is folded over and attached to a carbon blade; Fig. 2, a sectional view, taken as indicated at line 22 of Fig. 1; Fig. 3, a side elevational view, showing a replaceable pack of carbon sheets adapted to fit into the pocket of the leader sheet; Fig. 4, a view of a pack similar to Fig. 3, but showing a modified attachment between the carbon sheets and backing sheet; Fig. 5, an enlarged sectional view similar to Fig. 2, showing how the leader sheet may be secured to a carbon blade; and Fig. 6, a fragmentary sectional view, taken as indicated at line 66 of Fig. 1.

In the embodiment illustrated, a permanent leader sheet has a lower portion 7 and a top portion 8 connected along a fold line. Preferably, the leader sheet is made of a smooth plastic material such as .005 acetate, but heavy paper or cardboard can be used, if preferred. As best shown in Figs. 1 and 5, a pair of cut-out portions 9 are provided along the folded edge to expose a portion of a conventional metal carbon-holding blade 10. After the leader sheet has been properly positioned along the blade it may be locked in position by means of strips of pressure sensitive tape 11.

As shown in Figs. 1 and 2, the front marginal edge portion of the lower portion of the leader sheet is folded upwardly and rearwardly, as indicated at 12, to form a rearwardly open pocket 13. The front edge of the pocket is shown with a notch 14 to receive a positioning tab 15 on the replaceable carbon packet 16.

As shown in Fig. l, the lower portion of the leader sheet 7 is also provided with a corner tab 17, which may be cemented in place and forms a corner pocket to receive the rear corner of a backing sheet 18 provided on the packet 16. The backing sheet preferably is made of cardboard commonly known as tag stock.

The replaceable packet '16 has a plurality of folded carbon sheets 19 stitched to its stiff backing sheet 18 along a straight line, as indicated at 20. The line 20 is spaced back of the front edge of the leader sheet, so that when the pack is placed in the pocket 13, and one of the carbon sheets 19 is drawn forwardly, the tension will be applied to the line of stitching and not to the rear edge of the flap 12. This is important, because the tension will not tend to unfold the flap. Also, because the rear portion of the backing sheet is held by the pocket formed by the tab 17, the backing sheet will be held flat and cannot pull up and away from the lower portion 7 of the leader sheet.

In the modification shown in Fig. 4, the construction is the same, except that the front edge of the carbon sheets 21 are arranged in overlapping end-to-end arrangement before the stitching 22 is applied. By this arrangement, when one of the carbon sheets 21 is drawn forwardly to extended position it will pull directly against the lineof stitching 22 instead of against the whole line of stitching, as in the form shown in Fig. 3. This provides greater strength against tearing. In both forms of pack, if desired, a piece of tissue paper 23 may be provided around the carbon sheets to protect them during handling without interfering with their operation.

After the leader sheet has been properly fixed to the carbon blade 10, a carbon pack may be installed or replaced very easily. The front edge of the backing sheet 18 may be slid into position in the pocket 13 until the tab 15 engages the notch 14. The rear corner of the backing sheet is then snapped into the corner pocket provided by the tab 17, and one of the carbon sheets 19 may be extended forwardly into writing position. The remaining supply of carbon sheets are protected by the guard apron 8 of the leader sheet. In this form, the front marginal portions of both the leader sheet and the carbon sheets 19 fit into the pocket 13.

In the pack shown in Fig. 4, only the front marginal portion of the backing sheet fits into the pocket, and the carbon sheets are folded rearwardly over the line of stitching 22 until extended to writing position. It will be noted that with either form of carbon pack tension is applied to the front folded edge of the leader sheet by the front edge of the backing sheet.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, for some modifications will be obvious to those skilled in the art.

I claim:

1. A carbon pack and holder, adapted for use between a pair of continuous-form stationery strips, comprising: a folded leader sheet adapted to be secured to a blade between forwardly advancing stationery strips, the lower portion of said sheet having its front marginal edge portion folded upwardly and rearwardly to form a rearwardly-open front pocket, and the upper portion of the sheet having its free end extending forwardly over the leader sheet to form a guard apron; a tab member on one edge of the leader sheet spaced from the front marginal edge thereof and forming a forwardly facing pocket; a backing-sheet for placement in the leader sheet and having a front edge portion adapted to fit into and against the folded portion of said front pocket and a corner to fit under said tab member to cooperatively hold the backing sheet and leader sheet together; and a plurality of folded carbon sheets having their front marginal portion sewed to said backing-sheet along a straight line in rear of the rear edge of the pocket in said leader sheet when the backing sheet is in the front pocket.

2. A carbon pack and holder as specified in claim 1, in which the front pocket has an alignment notch in its folded edge, and the front edge of the backing sheet has a forwardly extending tab adapted to fit into said notch to prevent lateral shifting when the backing-sheet edge is properly positioned in the pocket.

3. A carbon pack and holder adapted for use with a permanent leader sheet provided at its front end with a rearwardly and laterally open pocket, and a tab member on an edge of the leader sheet forming a forwardly facing pocket, said pack having a backing-sheet Whose front edge portion removably fits into and against the folded portion of said pocket with a corner thereof fitting into said forwardly facing pocket, and a plurality of carbon strips having their front marginal portion sewed to said backing sheet along a straight line a short distance behind the portion of the backing-sheet which enters the pocket, said carbons being folded about midway of their length and each being extendable forwardly from the line of stitching to writing position.

4 4. A carbon pack and holder as specified in claim 3, in which the carbon sheets are connected to the backing sheet in overlapping end-to-end arrangement so that a carbon sheet will be completely unfolded when in extended writing position.

References Cited in the file of this patent UNITED STATES PATENTS 1,552,815 Baldwin Sept. 8, 1925 1,552,879 Randolph Sept. 8, 1925 2,257,381 Humphrey et al. Sept. 30, 1941 2,343,796 Petit Mar. 7, 1944 2,387,667 Leibfritz Oct. 23, 1945 2,565,031 Kohut Aug. 21, 1951 2,615,731 Doyle Oct. 28, 1952

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